MOHR: The TDR Experts!

Manufacturer of the world's best portable metallic TDRs

For more than 35 years, we've provided our customers with innovative sensor technologies and dependable engineering consulting expertise. If you have a need for a precision TDR that can be used in the field, we're the source. If you need help solving a complex problem, we're the folks for that too.

CT100B TDR Cable Analyzer
High-Resolution TDR with Frequency-Domain Analysis!

CT100/CT100B TDR Cable Analyzer The CT100B* TDR Cable Analyzer is the industry's highest-resolution portable TDR, ideal for precision testing of all types of coaxial, twisted-pair, and multiconductor cables and connectors. The CT100B is the only metallic cable TDR with frequency-domain analysis tools including Return Loss (S11), Cable Loss (S21), and Smith charts.
The CT100B is the only portable instrument exceeding all TDR performance specifications of the popular Tektronix® 1502, 1502B, and 1502C TDRs. See comparison.

CT100B TDR Specifications

  • 20-80% risetime less than 100 ps
  • Up to 5 GHz test bandwidth
  • 500 Hz framerate for detecting transient faults
  • 75 µm (0.003 in) cursor resolution
  • 16-bit impedance measurements

CT100HF** TDR Specifications

  • 20-80% risetime less than 60 ps
  • Up to 8 GHz test bandwidth

Key Features

  • Rugged, lightweight, portable
  • Bright color screen, long battery life
  • 2+ GB storage for saving traces and configurations
  • USB, 10/100 Ethernet PC connectivity
  • USB keyboard, thumbdrive, barcode reader

*CT100B and CT100HF are the latest models in the CT100-series of TDRs from MOHR.
**CT100HF is a higher performing laboratory instrument than the CT100B, but its electronic circuitry is more sensitive to electrical overload.

Click here for more information about MOHR TDRs.



The CT100-DA-1394 Firewire Adapter is designed to speed up testing of IEEE-1394b cables. It performs accurate differential impedance measurements using MOHR's single-ended TDR.

It has a mini-USB connection to a CT100B for software controlled switching between the two pairs of conductors, as well as a push-button for manually toggling the connection.

Our Precision BNC Adapter Kit offers direct high-bandwidth coupling for testing most coaxial cables and interconnects: BNC-BNC, N-N, SMA-SMA, BNC-N, SMA-BNC, SMA-N, and SMA-TNC. The kit comes in a rugged plastic case.

The CT100-AK-PSP Pin and Socket Probe Kit is the industry's only impedance matched pin and socket probe kit designed specifically for use with a high-resolution TDR. The kit components interface to a wide variety of military and commercial multi-conductor connector types. The minimal impedance change through the CT100-AK-PSP connectors preserves the ability to detect small flaws in the cable being tested.

The CT100-DA-TRB Differential Test Set Adapter - TRB allows for low-loss differential TDR measurements to be made of MIL STD 1553B networks using the single port CT100B.

The combination of a CT100B with the CT100-DA-TRB adapter will perform accurate, high resolution impedance measurements in installed 1553B systems. The adapter can be connected to either the main bus or to a stub, and the CT100B TDR signal will pass through multiple bus transformers to scan several cable segments at a time.


See the complete list of adapters and other accessories for the CT100 series of TDRs.


MOHR Oil Field Instrumentation

Real-Time Measurement of Drilling Fluids and Production Flow Streams

MOHR Oil Field Drilling Mud System measurement probes provide real-time measurement of the oil/water ratios of drilling mud, along with the density and flow rate.

MOHR Oil Field Flow System measurement system provides real-time measurement of the oil, water and gas components of production flow streams, along with the flow rate.

MOHR Oil Field Wet Gas System measurement system provides real-time measurement of the wet gas component of production flow streams, along with the flow rate.

The MOHR systems are rugged, field reliable solutions that are easily integrated into any oil field operation. The systems do not require calibration in the field. The sensors require minimal maintenance.


MOHR EFP-IL SFPI System for Spent Fuel Pool Level Instrumentation

EFP-IL SFPI System for Spent Fuel Pool Level Instrumentation

  • Panel-mount EFP-IL and portable EFP-HL signal processors.
  • Meets all NRC Order EA-12-051 requirements for Spent Fuel Pool Instrumentation (SFPI).
  • Precision remote water level measurement up to 1000 ft. from the pool.
  • Accurate in boiling / frothing environments.
  • Long life at elevated temperatures and pressures.
MDT Agricultural Penetrometer and Texture Analyzer

MDT Series Automated Materials Testers

  • Fruit penetrometers and texture analyzers give accurate, repeatable results.
  • Tests interior portion of fruit as well as outer regions.
  • Constant-rate, Creep, and Crispness testing combine for the Quality Factor
  • Saves 50% or more of the time you spend testing.
  • Generates automated reports.
  • Also used for general materials testing.

Press Releases
(see all)

June 21, 2016

Meet the Industry's First TDR Cable Analyzer with Frequency Domain S-Parameter Measurements
eReleases / PR Newswire

March 25, 2016

Aging Aircraft Get Boost From 1553B Data Bus Test Kit
eReleases / PR Newswire

June 8, 2015

U.S. Navy Chooses MOHR TDR for Cable Testing Applications
eReleases / PR Newswire

March 9, 2015

MOHR Ships 1000th CT100 TDR Cable Tester
eReleases / PR Newswire

October 6, 2014

Donald C. Cook Nuclear Plant Successfully Installs MOHR Spent Fuel Pool Instrumentation (SFPI)
eReleases / PR Newswire

July 2, 2014

MOHR Nuclear Spent Fuel Pool Instrumentation (SFPI) Passes Acceptance Testing
eReleases / PR Newswire

April 26, 2013

MOHR to Supply Spent Fuel Pool Instrumentation to US Nuclear Stations
eReleases / PR Newswire

August 29, 2012

MOHR Introduces Precision Nuclear Spent Fuel Pool Level Monitoring System
eReleases / PR Newswire

June 30, 2012

MOHR Introduces New Texture Analyzer for Fruits and Vegetables
eReleases / PR Newswire

December 27, 2010

WSU Apple Breeding Program Picks Unique Taste-Testing Device
eReleases / PR Newswire

December 2, 2009

U.S. Navy Selects Mohr CT100 TDR to Replace Tektronix(R) 1502C
eReleases / PR Newswire

August 19, 2009

Mohr Presents CT100 Series TDR Cable Testers and CT Viewer at JAIMA SHOW 2009

April 3, 2009

Mohr Adds Internet Streaming, Remote Control and Video Capture to Microwave/RF TDR Cable Testers
eReleases / PR Newswire

January 20, 2009

Mohr Launches CT100 Series High-Resolution TDR Cable Testers for Analog/RF and Digital Communications Systems
eReleases / PR Newswire

MOHR in the News
(see all)

March 25, 2016

MOHR Introduces MIL-STD-1553B TRB Adapter Kit to Service Aging Aircraft
Avionics Magazine

July 1, 2015

MOHR Earns More with Navy Deal
Microwaves & RF Magazine (Print)

July 1, 2014

Spent Fuel Pool Instrumentation
Nuclear Plant Journal

November 27, 2012

Biting Apples with Science
Inside Science TV -- American Institute of Physics

August 29, 2012

Remote nuclear/industrial monitoring averts devastating accidents
EE Times (online)

December 28, 2011

Upgraded device tests apple crispness
The Grower (online)

December 15, 2011

Computerized penetrometer measures the crispness of apples

December 13, 2011

New Test For Apples Streamlines Science Of Crispness
Huffington Post

December 13, 2011

Computerized Tool Takes a Bite Out of Traditional Apple Testing
ScienceNewsline (online)

April 1, 2011

Distance-to-fault is spelled TDR or VNA
Evaluation Engineering

January 6, 2011

'Tooth' tool tests apples
Capital Press (Online)

January 4, 2011

WSU Apple Breeding Program Picks Unique Taste-Testing Device
GrowingProduce (Online)

December 8, 2010

Apple breeding program picks unique taste-testing device
Western Farm Press

December 1, 2010

Correlation of Sensory Analysis with Physical Textural Data from a Computerized Penetrometer in the Washington State University Apple Breeding Program

April 14, 2010

New wiring tools for maintainers
Joint Services Wiring Action Group Spring 2010 Newsletter

December 4, 2009

Mohr to support Navy's TDR upgrade
United Press International (

December 3, 2009

U.S. Navy selects Mohr CT100 TDR for electronic test and measurement
Military and Aerospace Electronics (Online)

May 1, 2009

Mohr adds Internet streaming to TDR cable testers
Test & Measurement World

April 9, 2009

Mohr Intros Software Upgrades for Microwave/RF TDR Cable Testers

March 1, 2009

TDR Cable Testers Reach Beyond 8.3 GHz
Microwaves & RF Magazine (Print)

January 29, 2009

Mohr TDR Replaces Tektronix 1502C
Microwaves & RF Magazine (Online)

January 21, 2009

Mohr and Associates Intro CT100 Series Time Domain Reflectometer Cable Testers

(see all)

June 12, 2018 - June 14, 2018

2018 Global Petroleum Show
Calgary, Canada
• Visit our booth to discuss our wet gas measuring system.

May 1, 2018 - May 3, 2018

2018 JSWAG Technical Interchange Meeting
Austin, TX

March 20, 2018 - March 20, 2018

Washington State University Post Harvest Fruit School
Prosser, WA. Wenatchee, WA.

December 4, 2017 - December 6, 2017

Washington State Tree Fruit Association NW Hort Expo
Three Rivers Convention Center, Kennewick, WA

February 27, 2017 - March 1, 2017

Joint Services Wiring Action Group (JSWAG) and Joint Fiber Optic Working Group (JFOWG) Technical Interchange Meeting (TIM)
Miramir Beach, FL

March 14, 2016 - March 17, 2016

Joint Services Wiring Action Group (JSWAG) and Joint Fiber Optic Working Group (JFOWG) Technical Interchange Meeting (TIM)
San Diego, CA

March 23, 2015 - March 26, 2015

Joint Services Wiring Action Group (JSWAG), Joint Fiber Optic Working Group (JFOWG), Aircraft Wiring Support Equipment Commodity (AWSEC) Technical Interchange Meeting (TIM)
Robins Air Force Base, GA

June 11, 2014

NRL GPETE Vendor Exhibit
Washington, DC

November 11, 2012 - November 15, 2012

American Nuclear Society (ANS) 2012 Winter Meeting and Nuclear Technology Expo
San Diego, CA

July 9, 2012 - July 13, 2012

GE 8th Annual Nuclear Instrumentation & Control Users Conference
Wilmington, NC

March 26, 2012 - March 29, 2012

March 2012 Joint Services Wiring Action Group (JSWAG) & Joint Fiber Optic Working Group (JFOWG) meeting
Virginia Beach, VA